SC–30
SUSPENSION CONTROL – ACTIVE HEIGHT CONTROL SUSPENSION
DTC
C1711/11
Front Height Control Sensor RH Circuit Malfunction
DTC
C1712/12
Front Height Control Sensor LH Circuit Malfunction
DTC
C1713/13 Rear Height Control Sensor Circuit Malfunction
DESCRIPTION
Inside each sensor, a brush integrated with the control sensor rotor shaft moves above the resister,
providing linear output. The resistance value between the brush and resistor terminal changes in
proportion to the shaft rotation angle, so the fixed voltage applied to the resistor by the ECU is modified by
the sensor and output to the ECU as a voltage indication the shaft rotation angle.
DTC No.
DTC Detection Condition
Trouble Area
C1711/11
When the following condition is consisting and
the abnormal signal continued for 1 sec. at
the vehicle speed 8 km/h (5 mph) or more:
Detecting the abnormal signal (Height control
sensor terminal voltage of ECU is 0.3 V or
less or 4.7 V or more) for every 0.01 sec. and
that continued for 0.2 sec.
•
•
•
Front height control sensor RH
Suspension control ECU
Wire harness
C1712/12
When the following condition is consisting and
the abnormal signal continued for 1 sec. at
the vehicle speed 8 km/h (5 mph) or more:
Detecting the abnormal signal (Height control
sensor terminal voltage of ECU is 0.3 V or
less or 4.7 V or more) for every 0.01 sec. and
that continued for 0.2 sec.
•
•
•
Front height control sensor LH
Suspension control ECU
Wire harness
C1713/13
When the following condition is consisting and
the abnormal signal continued for 1 sec. at
the vehicle speed 8 km/h (5 mph) or more:
Detecting the abnormal signal (Height control
sensor terminal voltage of ECU is 0.3 V or
less or 4.7 V or more) for every 0.01 sec. and
that continued for 0.2 sec.
•
•
•
Rear height control sensor
Suspension control ECU
Wire harness
HINT:
• DTC C1711/11 corresponds to the front height control sensor RH circuit.
• DTC C1712/12 corresponds to the front height control sensor LH circuit.
• DTC C1713/13 corresponds to the rear height control sensor circuit.
Fail-safe function:
If a trouble occurs in the height control sensor circuit, the height control is prohibited after the ECU has
adjusted the vehicle height to the standard (fluid pressure correspond to the standard height).
SC
SUSPENSION CONTROL – ACTIVE HEIGHT CONTROL SUSPENSION
SC–31
WIRING DIAGRAM
Suspension Control ECU
No. 7 Junction Block
H11
Front Height
Control Sensor
LH
R-L
1
G-Y
3
R-B
2
H12
Front Height
Control Sensor
RH
G-Y
3
R-B
2
R-L
1
H15
Rear Height
Control Sensor
R-B
1
G-Y
3
W
2
5
BI1
11
BI1
3
BI1
30
17
7D
7C
35
12
7D
7C
29
19
7D
7C
37
13
7D
7C
27
7D
18
R-B
7C
31
16
7D
7C
R-B
G-Y
W
19
BF5
20
BF5
18
BF5
R-B
G-Y
W
6
ID5
4
ID5
5
ID5
10
R-L
S7 SHFL
G-Y
9
S7 SHG
R-B
G-Y
1
S7 SHB
R-Y
G-Y
11
S7 SHFR
R-B
G-Y
W
2
S7 SHRR
SC
H100729E03
HINT:
When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2.
1
READ VALUE OF INTELLIGENT TESTER (HEIGHT CONTROL SENSOR)*1
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
SC–32
SUSPENSION CONTROL – ACTIVE HEIGHT CONTROL SUSPENSION
(b) Turn the ignition switch ON and push the intelligent
tester main switch ON.
(c) Select the DATA LIST mode on the intelligent tester.
(d) Check that the vehicle height value of the height control
sensor displayed by the intelligent tester is changing
when pushing the UP or DOWN button of the height
select switch.
OK:
Vehicle height value must be changing.
NG
Go to step 3
OK
REPLACE SUSPENSION CONTROL ECU
2
CHECK SUSPENSION CONTROL ECU*2
ON
(+)
(-)
SHB
SHG
H100730E01
OK
SC
(a) Remove the suspension control ECU with connectors
still connected.
(b) Turn the ignition switch ON.
(c) Measure the voltage between terminals SHB and SHG
of the suspension control ECU connector.
Standard voltage
Tester Connection
Specified Condition
S7-1 (SHB) - S7-9 (SHG)
Approximately 5 V
NG
Go to step 4
SUSPENSION CONTROL – ACTIVE HEIGHT CONTROL SUSPENSION
3
SC–33
INSPECT HEIGHT CONTROL SENSOR (FRONT RH, FRONT LH AND REAR)
(a)
(b)
(c)
(d)
Disconnect the height control sensor connector.
Remove the height control sensor.
Connect 3 dry batteries of 1.5 V in series.
Connect terminal 2 to the batteries' positive (+) terminal,
and terminal 3 to the batteries' negative (-) terminal, then
apply voltage about 4.5 V between terminals 2 and 3.
(e) Measure the voltage between terminals 1 and 3 when
the height control sensor link is slowly moved up and
down.
Standard voltage
Front Height Control Sensor
Min. LO
1
2
N
3
(+)
Tester Connection
(-)
Max. HI
Rear Height Control Sensor
(-)
N
Max. HI
Approximately 4.05 V
1-3
N
Approximately 2.25 V
1-3
Min. LO
Approximately 0.45 V
(+)
3
2
1
(j)
Max. HI
H100806E01
Specified Condition
1-3
(f)
(g)
(h)
(i)
Min. LO
Sensor Link Position
Disconnect the height control sensor connector.
Remove the height control sensor.
Connect 3 dry batteries of 1.5 V in series.
Connect terminal 1 to the batteries' positive (+) terminal,
and terminal 3 to the batteries' negative (-) terminal, then
apply voltage about 4.5 V between terminals 1 and 3.
Measure the voltage between terminals 2 and 3, when
the height control sensor link is slowly moved up and
down.
Standard voltage
Tester Connection
Sensor Link Position
Specified Condition
2-3
Max. HI
Approximately 4.05 V
2-3
N
Approximately 2.25 V
2-3
Min. LO
Approximately 0.45 V
NG
REPLACE HEIGHT CONTROL SENSOR
(FRONT RH, FRONT LH AND REAR)
OK
4
CHECK WIRE HARNESS (HEIGHT CONTROL SENSOR (FRONT RH, FRONT LH AND
REAR) - SUSPENSION CONTROL ECU)
NG
OK
REPLACE SUSPENSION CONTROL ECU
REPAIR OR REPLACE HARNESS AND
CONNECTOR
SC